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The global energy sector from a subsurface perspective

Geology & Geophysics

Unlocking fractured basement reservoirs

Molly Turko, Devon Energy
Fractured basement reservoirs, often igneous or metamorphic rocks like granite or gneiss, contrast with conventional sedimentary reservoirs. Without primary porosity, they depend on fracture networks for hydrocarbon storage and flow.…

Coring process step by step

Henk Kombrink
We often talk about core being the only ground-truth data from the subsurface, but how is core cut from a well at kilometres depth? With many geologists being stuck to…

A cool vitrinite reflectance model

David Rajmon, Consulting Geologist
A basin model de­scribes the ther­mal evolution of a basin to esti­mate when its source rocks expel hydrocarbons and of what type. Basin models do so by evaluating a num­ber…

I talk of dreams

Juan Cottier, MMbbls Subsurface Consulting
I am a dreamer. I always have been. Though not on the scale of Alexan­der the Great or Mar­tin Luther King, but I do dream every night, with complex narratives…

Carboniferous-Permian erosive contact, Kowala Quarry, Poland

Karol Jewuła, Bizon Geological Consulting
A spectacular erosive contact between Permian continental conglomerates and Lower Carboniferous marine strata can be observed at the Kowala Quarry in the Świętokrzyskie Mountains, Poland, situated in the southeastern part…

Deciphering Earth’s secrets

Molly Turko - Devon Energy
Faults on geolog­ical maps are far more than just lines; they are a critical form of communication, conveying essential infor­mation about the Earth’s subsurface structure and tectonic history. Central to…

Tectonically-influenced carbonate platform, Greece

Arve Lønøy, Lonoy Geoconsulting
A Pliocene carbonate platform (Rhodos Formation) is exposed in the NE part of the isle of Rhodes, Greece. Sedimentation was largely controlled by faulting relating to a late Pliocene or…

On the HUNT for Somalian core

Henk Kombrink
“Having worked on the first-ever offshore seismic survey in South Yemen in 1976, and seen the results of the first offshore well drilled in Yemeni waters, south of Socotra Island,…